Yes: Blood tests to make sure your blood clots normally are needed before a lumbar puncture.
Answered 2/15/2012
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Depends on question: Possibly, depending on why the LP is being done. Some tests require comparing the concentration of chemicals in the blood to that in the csf. Also, sometimes people need to make sure their blood is clotting properly before doing the lp, so as to reduce the risk of bleeding.
Answered 5/5/2016
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